AP7311
150mA, Low Quiescent Current, Fast Transient
Low Dropout Linear Regulator
AP7311 Rev. 2 1 of 13 NOVEMBER 2009
www.diodes.com © Diodes Incorporated
• 150mA Low Dropout Regulator with EN
• Very low I
Q
over full load: 65µA
• Wide input voltage range: 2V to 6V
• Wide adjustable output: 0.8V to 5.0V
• Fixed output options: 1.0V to 3.3V
• PSRR: 65dB at 100Hz
• Fast start-up time: 80µs
• Stable with low ESR, 1µF ceramic output capacitor
• Excellent Load/Line Transient Response
• Low dropout: 150mV typical at 150mA
• Current limit protection
• Short circuit protection
• Thermal shutdown protection
• Ambient temperature range: -40ºC to 85°C
• SOT25: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
The AP7311 is a 150mA, adjustable and fixed output voltage, low
dropout linear regulator. The device included pass element, error
amplifier, band-gap, current limit and thermal shutdown circuitry.
The device is turned on when EN pin is set to logic high level.
The characteristics of low dropout voltage and low quiescent
current make it suitable for low power applications, for example,
battery powered devices. The typical quiescent current is
approximately 65μA.
Built-in current-limit and thermal-shutdown functions prevent IC
from damage in fault conditions.
The AP7311 is available in SOT25 package.
• Notebook and Desktop Computers and Pheripherals
• Portable Devices
• Battery Powered Devices
• CD-ROM, DVD and LAN Cards
Typical Application Circuit
1uF
IN
GND
EN
OUT
Enable
1uF
V
IN
V
OUT
AP7311
Fixed Output
1uF
IN
GND
EN
OUT
Enable
ADJ
R2
R1
1uF
V
IN
V
OUT
AP7311
Adjustable Output
Features
Description
Applications
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
+=
2
1
REFOUT
R
R
1VV
